Fan



FIG. 1 is a perspective view of a new, original and ornamental design for a fan;

FIG. 2 is a front elevation view of FIG. 1;

FIG. 3 is a rear elevation view of FIG. 1;

FIG. 4 is a right side elevation view of FIG. 1;

FIG. 5 is a left side elevation view of FIG. 1; and,

FIG. 6 is a top plan view of FIG. 1.

The broken lines in the drawings depict portions of the fan that form no part of the claimed design. 

CLAIM The ornamental design for a fan, as shown and described. 